Wall lamp



FIG. 1 is a front elevational view embodying my design for a wall lamp;

FIG. 2 is a side elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a bottom view thereof; and,

FIG. 5 is a top plan view thereof. 

The ornamental design for a wall lamp, as shown and described. 